[AMBARI-10440] Manual RU - Client-only services need restart to advertise version

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.1, 2.1.0
• Component/s: ambari-web
• Assignee: Antonenko Alexander
• Reporter: Antonenko Alexander
• Created: 10/Apr/15 14:55
• Updated: 10/Apr/15 21:11
• Resolved: 10/Apr/15 21:11

Description

Basically, the UI provides no way of restarting Clients (which technically cannot be started because they are not daemons). The only way that a Client can advertise its version is when it is installed, or during a RESTART command. Some clients are part of services that also have masters, so if the service is restarted, then so are the clients and they advertise their version.
However, Oozie, Pig, and Tez are client-only services, so a manual RU needs a way for them to advertise their version.

There are 2 potential solutions.
1. UI - allow client-only services to have a RESTART action
2. Modify the ambari-server set-current command to issue curl calls for all of the clients.

Approach 1 is simpler, but may make the UI seem non-sensical.
Approach 2 is much harder, because the Python script would have to figure out which services need it, and then issue curl calls that include all of the hosts for that Service Component (e.g., Oozie cilent)